Unluckyfett
New Member
Last Activity: 08-03-2024, 11:56 AM
Joined: 07-23-2024
Location: Seneca Falls, New York
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Yes and no. IC6 was the problem. When I posted originally, I speculated IC8 because of the waveforms. However, I misunderstood the DAC process, and with some help from another forum, I narrowed it down to DRAM. -
The problem is the DRAM. I replaced the IC and its fixed now. Hopefully this helps someone in the future....Leave a comment:
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The problem is the DRAM. I replaced the IC and its fixed now. Hopefully this helps someone in the future....Leave a comment:
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Again, not 💯 on the whole AD-DA process but it looks like things start to breakdown at IC8. I ordered one and we'll see what happens...Leave a comment:
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I have the exact same problem, I started another thread about it. Did you ever find a resolution? At this point I'm looking at IC8 as being the problem.Leave a comment:
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I pulled C049 to help isolate the problem, and that killed the ticking garbage noise but no delay (obviously). So I used the tone probe back to IC8. I am not sure how the whole DA thing is accomplished but I know it's done by RA1 and IC8b. Looking before IC7, pin 3 of IC5 has clean signal. If I understand correctly, pin 7 of IC5 should be serial pulses, which it seems to be. So now I'm wondering if its a problem with RA1 and IC8b or if theres a problem with the micro controller. For shiggles I checked the adjustment of the clock as shown in the documentation and it says the pulse should be 5v...Leave a comment:
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Boss DD-3 (b) Problem
Bypass works, direct out works. Delay signal is not right. ​​​​​Clock seems to be working. I replaced all 10uf electrolytics just because. No change. Based on sound and experience, should I be looking at the AD part or the DA part? I found a breakdown of how the microcontroller samples 12bit audio, I have a scope, I plan on doing more probing, just bothering me as I sit at home with it on my bench at work waiting to be fixed. If I'm reading correctly pin 7 on IC5 should be ≈ input signal. And pin 7 on IC8 should be delayed waveform? So if I have clean delayed waveform on IC8, the problem... -
Hi. My name is Frankie. I started with guitar amplifiers in 2008 and I haven't stopped since....Leave a comment:
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